Approximately 3.41 pounds (1.5 kg).
1.8 inches high by 10.5 inches deep by 6.8 inches long.
Wii U GamePad
The GamePad controller has a 6.2-inch, 16:9 LCD touch screen, as well as button controls and two clickable analog sticks. The buttons include a D-pad, A/B/X/Y buttons, L/R bumpers, ZL/ZR buttons, Power button, HOME button, -/SELECT button, +/START button, and TV CONTROL button. The GamePad has motion control (accelerometer, gyroscope and geomagnetic sensor), a front-facing camera, a microphone, stereo speakers, rumble, sensor bar, stylus and support for Near Field Communication (NFC). It is powered by a rechargeable lithium-ion battery and has an approximate weight of 1.1 pounds (500 g).
Supports 1080p, 1080i, 720p, 480p and 480i output. Compatible cables for the Wii U are HDMI, Wii D-Terminal, Wii Component Video, Wii RGB, Wii S-Video Stereo AV and Wii AV.
AMD Radeon High Definition GPU.
Wii U has an internal flash memory. It also uses SD memory cards and external USB storage.
Wii U and Wii optical discs.
Wii U is wifi enabled (IEEE 802.11b/g/n) and has four USB 2.0 connectors – two in the front and two in the back that care compatible with the Wii LAN Adapters.
Nearly all Wii software and accessories are compatible
The Wii U uses six-channel PCM linear output through HDMI, or analog output via the AV Multi Out connector.